EO1 Technology Workshop

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Section 8 Science Validation Process
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Science Validation Team

• Instrument Team
• Validate/re-establish and refine pre-launch
  characterizations
• Provide technology validation
• Participate on Science Validation Team
• NASA Selected Investigators
• Conduct scene based instrument performance
  characterizations
• Measure ability of instruments to make
  Landsat-like observations
• Assess capability for addressing earth remote
  sensing applications
• Assist in technology validation
• Facilitate Commercial Applications (CRSP/SSC)
• International Collaborators
• Argentina, Australia, Canada, Italy, Japan,
  Singapore

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If scientists supply accurate and reliable
information, policy makers can make intelligent
and responsible decisions to preserve an
acceptable quality of life for our children and
grandchildren.
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Characterization Validation

• Characterization quantitatively describes how the
  three EO-1 instruments respond to incident
  radiation (light) under a variety of operating
  conditions.
• Validation assesses the EO-1 instrument
  measurements by comparing them against ground
  truth. We also assess performance.

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Whats So Exciting About Calibration?

• Calibration is the stuff you do to insure
  accurate and repeatable measurements with the
  EO-1 instrumentsHo hum!
• Calibration can be used to provide a common basis
  for inter-comparing global measurements across a
  variety of earth satellite observing systems with
  profound ramifications!

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EO-1 and Landsat
Landsat-7
EO-1
Less Than 1 Minute
Landsat ETM Multispectral Swath Coverage (185 km
_at_ 30 m)
ALI Multispectral Swath Coverage (37 km _at_ 30 m)
Atmospheric Corrector Hyperspectral Coverage (185
km _at_ 125 / 250 m)
AVIRIS Underflight (10 km _at_ 20 m)
Hyperion Hyperspectral Swath Coverage (7.5 km _at_
30 m)
705 km Altitude
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EO-1 and Landsat 7Descending Orbit Ground Tracks
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EO-1 Instrument Overviews
ALI
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3
Excludes thermal channel 35 cm-1 constant
resolution
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EO-1 Instrument Overviews
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3
Excludes thermal channel 35 cm-1 constant
resolution
Hyperspectral Analysis derives from the use of
contiguous spectral channels, allowing the use of
derivatives and sophisticated analysis
techniques. The large number of bands allows more
complex systems to be addressed without the under
sampling inherent in multispectral systems.
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Investigator Research Topics
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Investigator Research Topics (continued)
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Investigator Research Topics (continued)
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The EOS AM Constellation Alignmentfor March,
2001
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AM Constellation Descending Orbit Ground Tracks
Terra MODIS
SAC-C
N
Landsat 7 ETM
EO-1 ALI
EO-1 Hyperion
EO-1 Atmospheric Corrector
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Kakadu
Cape Tribulation
Cooper Creek
Lake Argyle
Batt Reef
Daintree
Mossman
Townsville Reef
Port Hedland
Goldsworthy
Panorama
Kunoth
Amburla
Moreton Bay
Lake Eyre
Mt Fitton
Tinga tingana
Toolabin
Uardry
Lake George
EOC Hyperspectral Sites
Kioloa
Majura Valley
Tanjil Bren
Potential 1st 60 days Sites
X band sites
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Argentina Validation Site Zone Map for AVIRIS
and EO-1/SAC-C overflights
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Argentine Test Sites
Cordoba
Mendoza
Madryn
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First Light Image of Alaska
L7 PAN
ALI PAN
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Why Is the ALI Pan Band Better Than the ETM Pan
Band?

• Improved Radiometric resolution
• Superior signal-to-noise
• 12-bit versus 8-bit representation of dynamic
  range
• Inherently higher contrast measurement
• ALI pan restricted to 480 490nm VIS spectral
  interval
• ETM spans vegetation transition rise (520
  900nm)
• Smaller pixel size (IFOV)
• ALI pan IFOV is 10 meters
• ETM is nominally 15 meters (effectively 18
  meters)

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Hyperion Image - Argentina
Hyperspectral DCE Acquired Dec 1, 2000 Color
image produced using 3 bands in visible Blue
band 14 (488 nm) Green band 20 (549 nm)
Red band 38 (731 nm) (red shows areas of new
spring growth)
Image No. EO12000336_002002C_r1_image0su Approx.
7.5 km wide x 65 km long NORTH
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Area of First Hyperion Image Collection (Green
Square)
Area of First Image